CN210895793U - Electromagnetic field anti-interference performance test system of vehicle-mounted emergency call system - Google Patents
Electromagnetic field anti-interference performance test system of vehicle-mounted emergency call system Download PDFInfo
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- CN210895793U CN210895793U CN201922232511.7U CN201922232511U CN210895793U CN 210895793 U CN210895793 U CN 210895793U CN 201922232511 U CN201922232511 U CN 201922232511U CN 210895793 U CN210895793 U CN 210895793U
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Abstract
The utility model provides an on-vehicle emergency call system's electromagnetic field immunity capability test system. The test system comprises a control unit and an electromagnetic interference generating unit connected with the control unit; the satellite communication system also comprises a communication comprehensive tester or a combination of the communication comprehensive tester and a satellite signal generator; and a vehicle-mounted emergency call system is arranged on the tested vehicle positioned in the anechoic chamber, and the vehicle-mounted emergency call system and the communication comprehensive tester can carry out uplink and downlink communication interaction. The mobile base station signals of the upper and lower links provided by the communication comprehensive tester in the test system can comprehensively inspect the upper and lower links of the vehicle-mounted emergency call system, and more accurately test the electromagnetic field anti-interference performance of the vehicle-mounted emergency call system.
Description
Technical Field
The utility model relates to a vehicle anti-interference test field, concretely relates to electromagnetic field immunity to interference capability test system of on-vehicle emergency call system.
Background
At present, along with the continuous evolution of the automobile society in China, the safety problem must be paid attention to, especially, the fatality rate of 17% of traffic accidents in China is 9 times higher than that of 2% of developed countries, and the traffic safety in China faces more severe situations. The reason that the death rate of the traffic accident is high in China is analyzed, and the important reasons are that the emergency rescue mechanism of the traffic accident is not complete, and the wounded person cannot be rapidly treated after the traffic accident happens. After an accident occurs, medical assistance is accurately and timely provided for accident injured personnel in the shortest time, and the medical assistance is an important factor for reducing the accident fatality rate and disability rate.
In recent years, more complete emergency rescue mechanisms are discussed in all countries in the world, and at present, a vehicle-mounted accident emergency call system is an internationally universally accepted emergency rescue mode. National governments such as the european union, russia, japan, and the like and vehicle manufacturers all advocate to improve the current situation of emergency rescue of an emergency accident by installing a vehicle-mounted emergency call system and establishing a public safety answering point. Based on the reference of the international vehicle-mounted accident emergency call system, China combines the current situation of relevant industries of China and the actual national situation, and is accelerating the standardization work of the domestic vehicle-mounted accident emergency call system.
The vehicle-mounted accident emergency call system is a complete solution of 'terminal + platform + service' aiming at traffic accident scenes, detects the occurrence of accidents through the sensing of the vehicle-mounted system when serious accidents occur to vehicles, timely sends the vehicle positions and related vehicle information to a rescue platform, schedules public rescue resources by the rescue platform, and simultaneously provides medical assistance for accident injured personnel, so that the interference resistance of the vehicle-mounted accident emergency call system is directly related to the life safety problem of the accident injured personnel.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects in the prior art, the utility model aims to provide an electromagnetic field immunity performance test system of on-vehicle emergency call system.
In order to achieve the above object of the present invention, the present invention provides an electromagnetic field immunity test system of a vehicle-mounted emergency call system, which comprises a control unit and an electromagnetic interference generating unit connected with the control unit;
the satellite communication system also comprises a communication comprehensive tester or a combination of the communication comprehensive tester and a satellite signal generator;
the first signal ends of the communication comprehensive tester and the satellite signal generator are respectively connected with the control unit in a bidirectional mode, the control unit controls the communication comprehensive tester and/or the satellite signal generator to output signals, and the second signal ends of the communication comprehensive tester and the satellite signal generator are respectively connected with corresponding antennas in the anechoic chamber;
the output end of the electromagnetic interference generating unit is connected with a corresponding antenna in the anechoic chamber;
and a vehicle-mounted emergency call system is arranged on the tested vehicle positioned in the anechoic chamber, and the vehicle-mounted emergency call system and the communication comprehensive tester can carry out uplink and downlink communication interaction.
The electromagnetic field anti-interference performance testing system of the vehicle-mounted emergency call system integrates the mobile communication technology and the satellite navigation technology, not only provides downlink signals for simulating satellites and broadcasting, but also provides mobile base station signals with uplink and downlink, and can simulate the actual working condition of a vehicle. The mobile base station signals of the upper and lower links provided by the communication comprehensive tester in the test system can comprehensively inspect the upper and lower links of the vehicle-mounted emergency call system, and more accurately test the electromagnetic field anti-interference performance of the vehicle-mounted emergency call system.
The preferable scheme of the electromagnetic field anti-interference performance testing system of the vehicle-mounted emergency call system is as follows: and a filter is connected in series in the uplink of the communication comprehensive tester and the vehicle-mounted emergency call system. Electromagnetic field interference rejection signals are prevented from being coupled to the uplink antenna, so that the mobile base station simulation equipment is damaged, and only signals in a communication frequency band are allowed to pass through after the filter is arranged, so that the aim of protecting the mobile base station simulation equipment is fulfilled.
It should be further noted that the electromagnetic field immunity test system and the method of the vehicle-mounted emergency call system are not only suitable for testing vehicles equipped with the emergency call system, but also suitable for testing independent technical units of the emergency call system.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic structural diagram of an electromagnetic field disturbance rejection performance testing system of a vehicle-mounted emergency call system.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.
In the description of the present invention, unless otherwise specified and limited, it is to be noted that the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, mechanically or electrically connected, or may be connected between two elements through an intermediate medium, or may be directly connected or indirectly connected, and specific meanings of the terms may be understood by those skilled in the art according to specific situations.
As shown in fig. 1, the utility model provides an on-vehicle emergency call system's electromagnetic field immunity capability test system, including the control unit and with the electromagnetic interference who the control unit connects produces the unit, still including setting up the communication comprehensive tester outside the anechoic chamber, perhaps sets up the combination of communication comprehensive tester and satellite signal generator outside the anechoic chamber.
The first signal ends of the communication comprehensive tester and the satellite signal generator are respectively connected with the control unit in a bidirectional mode, the control unit controls the communication comprehensive tester and/or the satellite signal generator to output signals, and the second signal ends of the communication comprehensive tester and the satellite signal generator are respectively connected with corresponding antennas in the anechoic chamber; the control unit controls the electromagnetic interference generating unit to send out interference signals, and the output end of the electromagnetic interference generating unit is connected with a corresponding antenna in the anechoic chamber.
The vehicle to be tested in the anechoic chamber is provided with a vehicle-mounted emergency call system 3, the vehicle-mounted emergency call system 3 and the communication comprehensive tester can carry out uplink and downlink communication interaction, including network registration, uploading of MSD (Minimum Set of Data) Data and voice telephone connection.
Specifically, the satellite signal generator generates a simulated satellite navigation signal, and the simulated satellite navigation signal is introduced into the darkroom through a coaxial cable and a satellite transmitting antenna I1; the communication comprehensive tester generates a simulated moving base station signal, and the simulated moving base station signal is introduced into the darkroom through the coaxial cable and the base station communication antenna II 2; the control unit controls the satellite signal simulator and the communication comprehensive tester to output signals, and simultaneously synchronizes an original signal output by the satellite signal generator, an original signal output by the communication comprehensive tester and an uplink signal received by the communication comprehensive tester into the control unit in real time so as to facilitate data analysis and comparison; the EMC32 electromagnetic field immunity test unit in the control unit is used to control the electromagnetic interference generating unit to generate immunity signal according to immunity test frequency band, step, residence time, modulation, etc. the present method is adopted, and the electromagnetic interference generating unit is preferably but not limited to radio frequency signal source. The anti-interference signal generated by the radio frequency signal source is transmitted to the input end of the EMS power amplifier through the coaxial cable, the EMS power amplifier amplifies the input radio frequency signal and introduces the amplified radio frequency signal into the darkroom through the coaxial cable and the EMS antenna III 4. The satellite signal receiver in the vehicle-mounted emergency call system 3 receives the simulated satellite navigation signal, positions the vehicle, generates vehicle position data, communicates with the communication integrated tester through a mobile communication module (such as a GSM/WCDMA network module) in the vehicle-mounted emergency call system 3, sends MSD data to the communication integrated tester, initiates voice connection and the like.
And the analog PSAP unit in the control unit is in communication connection with the vehicle-mounted emergency call system through the communication comprehensive tester, wherein the communication comprehensive tester comprises a voice connection. And after the analog PSAP unit establishes voice connection with the vehicle-mounted emergency call system, judging the voice call quality. The PSAP is a public security video actual combat application platform and is a brand new networking platform based on a public security big information system. The PSAP may be simulated using existing analog PSAP units or existing methods.
In this embodiment, the voice call quality determination may be performed by subjectively determining the voice call quality by a test engineer after establishing connection through voice, or by comparing the received voice call information with a voice call reference template stored inside the control unit, so as to determine the voice call quality.
In order to prevent the electromagnetic field interference-resistant signal from being coupled to the second base station communication antenna 2 and further damaging the mobile base station analog equipment, a filter, preferably but not limited to a band-pass filter, is connected in series in the communication comprehensive tester and the uplink carrying the emergency call-for-help system, and only allows the signal in the communication frequency band to pass through, so that the purpose of protecting the communication comprehensive tester is achieved.
The control unit analyzes and compares data according to the original signal output by the satellite signal generator and/or the original signal output by the communication comprehensive tester and the uplink signal received by the communication comprehensive tester to complete the test of the electromagnetic field interference resistance of the vehicle-mounted emergency call system 3, and the existing analyzing and comparing method is adopted.
The original signal output by the satellite signal is not only introduced into a darkroom, but also uploaded to a control unit, MSD data received by the communication comprehensive tester contains navigation position information analyzed by an automobile and vehicle information inherent to the automobile, and the control unit compares the original data with the received data when performing data analysis and comparison, and judges the electromagnetic field anti-interference level of the control unit according to the deviation degree of the two data.
In the application, the communication comprehensive tester belongs to comprehensive wireless communication test equipment, various communication performances and function tests including bit error rate, throughput and the like are integrated, and the control unit, the electromagnetic interference generating unit, the communication comprehensive tester and the satellite signal generator are arranged outside a darkroom or in an EMC control room.
In this embodiment, the communication comprehensive tester may have any existing structure, and may specifically be, but is not limited to, CMW 500. The satellite signal generator may be any existing structure, and may be, but is not limited to, SMBV 100B. The method for transmitting the preset data to the control communication comprehensive tester and the satellite signal generator and the method for controlling the operation of the same by the specific control unit can adopt the prior art, and the control unit is preferably, but not limited to, a PC.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (6)
1. The electromagnetic field anti-interference performance test system of the vehicle-mounted emergency call system is characterized by comprising a control unit and an electromagnetic interference generating unit connected with the control unit;
the satellite communication system also comprises a communication comprehensive tester or a combination of the communication comprehensive tester and a satellite signal generator;
the first signal ends of the communication comprehensive tester and the satellite signal generator are respectively connected with the control unit in a bidirectional mode, the control unit controls the communication comprehensive tester and/or the satellite signal generator to output signals, and the second signal ends of the communication comprehensive tester and the satellite signal generator are respectively connected with corresponding antennas in the anechoic chamber;
the output end of the electromagnetic interference generating unit is connected with a corresponding antenna in the anechoic chamber;
and a vehicle-mounted emergency call system is arranged on the tested vehicle positioned in the anechoic chamber, and the vehicle-mounted emergency call system and the communication comprehensive tester can carry out uplink and downlink communication interaction.
2. The system for testing the electromagnetic field immunity of an on-board emergency call system as claimed in claim 1, wherein a filter is connected in series between the communication comprehensive tester and an uplink of the on-board emergency call system.
3. The system for testing the electromagnetic field immunity of a vehicle-mounted emergency call system according to claim 1, wherein the signal output end of the electromagnetic interference generating unit is connected to the input end of an EMS power amplifier, and the EMS power amplifier is connected to a corresponding antenna in the anechoic chamber.
4. The electromagnetic field immunity test system of the vehicle-mounted emergency call system of claim 1, wherein the control unit, the electromagnetic interference generating unit, the communication comprehensive tester and the satellite signal generator are disposed outside a darkroom or inside an EMC control room.
5. The system for testing the electromagnetic field immunity to interference of a vehicle-mounted emergency call system according to claim 1 or 3, wherein the electromagnetic interference generating unit is a radio frequency signal source.
6. The system for testing the electromagnetic field immunity to interference of the vehicle-mounted emergency call system according to claim 1, wherein the control unit comprises an electromagnetic field immunity test unit and a simulation PSAP unit, the electromagnetic field immunity test unit controls the electromagnetic interference generating unit to generate immunity signals, and the simulation PSAP unit is in communication connection with the vehicle-mounted emergency call system through the communication comprehensive tester, wherein the communication comprehensive tester comprises a voice connection.
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| CN201922232511.7U CN210895793U (en) | 2019-12-12 | 2019-12-12 | Electromagnetic field anti-interference performance test system of vehicle-mounted emergency call system |
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| CN201922232511.7U CN210895793U (en) | 2019-12-12 | 2019-12-12 | Electromagnetic field anti-interference performance test system of vehicle-mounted emergency call system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110956791A (en) * | 2019-12-12 | 2020-04-03 | 中国汽车工程研究院股份有限公司 | Electromagnetic field anti-interference performance test system and method for vehicle-mounted emergency call system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110956791A (en) * | 2019-12-12 | 2020-04-03 | 中国汽车工程研究院股份有限公司 | Electromagnetic field anti-interference performance test system and method for vehicle-mounted emergency call system |
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